import java.util.ArrayList;

public class Test {
    public static void main(String[] args) {
    /*    StringBuilder stringBuilder = new StringBuilder("ss");
      StringBuilder  sb=  stringBuilder.append("ss");
        System.out.println(sb);*/
        ArrayList<Integer> arrayList = new ArrayList();
        arrayList.add(1);
        arrayList.add(2);
        System.out.println(arrayList);
        System.out.println(arrayList.size());
    }
}
